From the answer:
Thanks for bringing this to our attention, dsouza.david5 .... There are several factors that may triggered banking issue and it's possible that the web page is preventing you from making necessary changes with the transactions that will not update.

From the answer:
Hi there narendraraog, At this time, QuickBooks Online can only default one Accounts Payable.... If you have multiple accounts payable, the system will randomly assign it to other accounts payable.